多层CT 诊断强直性脊柱炎骶髂关节病变的价值

目的:评价多层CT诊断强直性脊柱炎骶髂关节病变的价值。方法:对32例患者行骶髂关节16层螺旋CT扫描,患者取仰卧位,采用各向同性的扫描,原始采集层厚0.75mm,矩阵512×512,层厚3mm,在工作站进行三维骨成像处理,包括多平面重建、最大强度投影和容积再现。结果:23例表现为不同程度关节面模糊、破坏,表现为软骨下骨质虫蚀状改变,11例发现皮质下小囊状透亮区。按CT表现分级,11例属于I级,8例属于Ⅱ级,8例属于Ⅲ级,5例属于IV级。结论:多层CT在强直性脊柱炎骶髂关节病变的鉴别诊断与分级中有较大价值,应作为临床可疑患者的优选检查。

The Value of Multi-slice CT in the Diagnosis of Ankylosing Spondylitis Sacroiliac Joint Leisions

Objective: To evaluate the multi-slice CT diagnosis of ankylosing spondylitis sacroiliac joint lesions.Methods: 32 pa-tients underwent 16-slice spiral CT scan in sacroiliac joint,the patient supine,using isotropic scanning,the original acquisition slice thickness 0.75mm,matrix 512 × 512,slice thickness 3mm.In workstation the three-dimensional bone imaging including multi-planar re-construction,maximum intensity projection and volume rendering.Results: 23 cases showed varying degrees of articular surface blur,damage,expressed as worm-eaten-like subchondral bone changes found in 11 patients with subcortical small cystic lucent zone.The per-formance of classification by CT,11 cases belong to class I,8 cases belonging to grade Ⅱ,8 cases are Ⅲ,5 patients belong to class IV.Conclusion: Multislice CT of ankylosing spondylitis in the sacroiliac joint disease in the differential diagnosis and classification has great value,should be preferred in patients with clinically suspicious checks.